DETECTION AND ANALYSIS OF TUNNEL DEFECTS WITH GROUND PENETRATING RADAR AT ZHANGWU MOUNTAIN

With regard to complex diseases of composite linings of railway tunnels, the ground penetrating radar (GPR) detection is researched. The results show that lining abnormalities can be reflected with the typical characteristics of the strong reflection zone and a continuous phase axis. The existence of numerous lossy dielectric material environments combined with the broad radio frequency spectrum leads to a wide range of GPR applications. The ability of GPR to image quickly is a powerful aspect of the method. Acquisition of wide-area coverage data lends itself to fast 3D subsurface imagery. Ground penetrating radar applied to tunnel lining structure quality inspection has changed the traditional destructive testing method and this technique is fast, simple, non-destructive, and accurate.